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OlgaM077 [116]
3 years ago
5

What is a force?

Physics
1 answer:
Fudgin [204]3 years ago
5 0

Answer:

2. A push or pull

Explanation:

I'm 100% sure

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brainly an electric heating element is connected to a 110V circuit and a current of 3.2A is flowing through the element. how muc
Naya [18.7K]

Energy used by the element = 6336000 j

The electrical energy is given by

E= V i t

V= voltage= 110 V

i= current=3.2 A

t= time= 5 h= 5 (3600)= 18000 s

so energy= E= 110 (3.2)(18000)

E=6336000 J

3 0
3 years ago
Why do baseball pitchers throw the ball at an angle that is slightly above the horizontal if they want the ball to reach at appr
lesantik [10]

Answer:

The angle above the horizontal at which the pitcher throws the ball determines the distance the ball travels before returning to the height at which it was thrown

Explanation:

The baseball is thrown as a projectile and the range, 'R', of the baseball which is the distance the baseball travels before the height above the ground returns to the initial height  is given given as follows;

R = \dfrac{u^2 \cdot sin(2\cdot \theta )}{g}

Where;

R = The range of the baseball = The horizontal distance away from the pitcher the ball reaches

u = The initial velocity with which the baseball was thrown

θ = The angle above horizontal a baseball pitcher throws the ball

g = The acceleration due to gravity ≈ 9.81 m/s²

From the the equation, when θ = 0, sin(θ) = sin(0) = 0 and the ball does not cover any horizontal distance before going lower than the height at which it was thrown, therefore, for the ball to travel further, the angle of launch, θ has to be larger than 0.

4 0
3 years ago
a hollow tennis ball and a lead filled tennis ball are dropped off a tall building. which reaches the ground first, the hollow b
Flura [38]
Lead filled. it has a higher mass, therefore gravity pulls on it harder, in turn making it fall faster. think of the saying "the bigger they fall, the harder they fall", in this case its "faster", not "harder."
5 0
3 years ago
Read 2 more answers
You exert 375 J to move a 45-kg object 5 m. How much force is required?
Serjik [45]
The amount of force required is 69J
8 0
3 years ago
Which of the following could be an example of chemical weathering?
belka [17]

Answer: B

Explanation:

Answers A and C are examples of physical weathering while B is chemical weathering when water and lime mix it creates a reaction

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3 years ago
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